shydrate/openjdk repository overview

java --version
openjdk 13.0.7 2021-04-20
OpenJDK Runtime Environment (build 13.0.7+5-Ubuntu-0ubuntu120.04)
OpenJDK 64-Bit Server VM (build 13.0.7+5-Ubuntu-0ubuntu120.04, mixed mode)

From shydrate/openjdk as build
WORKDIR /tmp
ADD ./target/jarfileName.jar app.jar
ENTRYPOINT [ "java", "-DskipTests", "-jar", "app.jar", "-Xmx256m"]